diff options
| -rw-r--r-- | progs/xdemos/glxgears.c | 32 |
1 files changed, 22 insertions, 10 deletions
diff --git a/progs/xdemos/glxgears.c b/progs/xdemos/glxgears.c index f8c6c75..c98c315 100644 --- a/progs/xdemos/glxgears.c +++ b/progs/xdemos/glxgears.c @@ -88,6 +88,11 @@ current_time(void) #endif +/** Event handler results: */ +#define NOP 0 +#define EXIT 1 +#define DRAW 2 + static GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0; static GLint gear1, gear2, gear3; static GLfloat angle = 0.0; @@ -322,10 +327,12 @@ draw_frame(Display *dpy, Window win) dt = t - tRot0; tRot0 = t; - /* advance rotation for next frame */ - angle += 70.0 * dt; /* 70 degrees per second */ - if (angle > 3600.0) - angle -= 3600.0; + if (animate) { + /* advance rotation for next frame */ + angle += 70.0 * dt; /* 70 degrees per second */ + if (angle > 3600.0) + angle -= 3600.0; + } draw_gears(); glXSwapBuffers(dpy, win); @@ -471,6 +478,7 @@ make_window( Display *dpy, const char *name, attr.border_pixel = 0; attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone); attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask; + /* XXX this is a bad way to get a borderless window! */ attr.override_redirect = fullscreen; mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask | CWOverrideRedirect; @@ -506,15 +514,14 @@ make_window( Display *dpy, const char *name, /** * Handle one X event. - * \return 1 if time to exit, 0 otherwise + * \return NOP, EXIT or DRAW */ static int handle_event(Display *dpy, Window win, XEvent *event) { switch (event->type) { case Expose: - /* we'll redraw below */ - break; + return DRAW; case ConfigureNotify: reshape(event->xconfigure.width, event->xconfigure.height); break; @@ -540,15 +547,16 @@ handle_event(Display *dpy, Window win, XEvent *event) NULL, NULL); if (buffer[0] == 27) { /* escape */ - return 1; + return EXIT; } else if (buffer[0] == 'a' || buffer[0] == 'A') { animate = !animate; } } + return DRAW; } } - return 0; + return NOP; } @@ -556,11 +564,15 @@ static void event_loop(Display *dpy, Window win) { while (1) { + int op; while (!animate || XPending(dpy) > 0) { XEvent event; XNextEvent(dpy, &event); - if (handle_event(dpy, win, &event)) + op = handle_event(dpy, win, &event); + if (op == EXIT) return; + else if (op == DRAW) + break; } draw_frame(dpy, win); |